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2,068 bytes added ,  13:17, 13 June 2022
Barcode weight + Testing barcodes sections
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== Barcode length ==
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The '''majority of product codes''' are following EAN-13 standard, and, as such, are '''13 chars length'''.
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As of 2022-04-06, Open Food Facts contains '''more than 12,000 products''' (~0.5%) with a barcode longer than 13 chars.
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* The majority of barcodes with 20 numbers are products prepared, packaged and sold by Bonarea (cheese, meat, fruits, etc.); eg. https://world.openfoodfacts.org/cgi/search.pl?search_terms=Queso+de+mezcla+semicirado&search_simple=1&action=process&json=1; these barcodes are true barcodes and not a data issue, as can be seen on [https://images.openfoodfacts.org/images/products/008/348/031/00320002774/front_es.3.400.jpg this picture].
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** They are beginning with 00.
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** Price seems to be included in the barcode: in [https://world.openfoodfacts.org/product/00162403200322003538/queso-oveja-curado 00162403200322003538], the price, €3.53, is included just before the last digit.
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** ~7500+ products
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* 20+ are beginning with 0105400141
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* [to be completed]
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Open Food Facts website '''can't display''' a product with a barcode longer than '''24''' chars ([https://github.com/openfoodfacts/openfoodfacts-server/issues/6571 a bug is open]).
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== Barcode weight ==
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For EAN-13 barcodes, GS1 recommend barcodes' weight to be ~32mm. In general, producers tend to use barcodes between 24 and 35 mm. Values below 24mm and above 35 are rare.
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== Testing barcodes with our apps ==
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It's interesting to control that our apps are playing well with different barcodes' size. We build a [https://docs.google.com/document/d/12VtFOsnHfK4PVwBJy_aHwSogX_yKRNfzoiHCPD1sxN0/edit# test document] that you can print and use with the app.
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== All things barcode ==
 
== All things barcode ==
 
* [[Barcodes/Non Standard Barcodes|Non Standard Barcodes]]
 
* [[Barcodes/Non Standard Barcodes|Non Standard Barcodes]]
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* [[Global brands and companies taxonomy]]: Barcode prefixes for brands are already included
 
* [[Global brands and companies taxonomy]]: Barcode prefixes for brands are already included
 
* [[Global countries taxonomy|Global countries taxonomy]] : Barcode prefixes for countries will be included
 
* [[Global countries taxonomy|Global countries taxonomy]] : Barcode prefixes for countries will be included
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* [[Barcodes/Countries]]: Map from barcode initials to country or purpose
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* [[Verification/Noteworthy Products#Products with same bar code]]: List of instances where two or more products have been identified as having the same barcode.
    
== Barcode related pages on Open Food Facts ==
 
== Barcode related pages on Open Food Facts ==
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** Get Product Code suggestions
 
** Get Product Code suggestions
 
** Get barcode API
 
** Get barcode API
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** Generate barcode SVG
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== See also ==
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* [https://en.wikipedia.org/wiki/Barcode Barcode] Wikipedia page.
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[[Category:Barcodes]]

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